Improvement in pantographic engraving-machines



- W. S. WIGHT. Pantographic Engraving Ma0hine.'

No. 197,507. Patented Nov. 27,1877.

WITNESSES INVENTOR ATTORN NLFETERS, FHOTO-LITHOGRAPHER. WASHINGTON D CUNITED STATES PATENT) WILLIAM S. WIGHT, OF GARRETTSVILLE, OHIO.

IMPROVEMENT :IN PANTOGRAPHIC ENGRAVING-MACH INES.

Specification forming part of Letters Patent No. 197,507, dated November27, 1877; application filed August 2, 1876.

' Garrettsville, in the county of Portage and State of Ohio, haveinvented certain new and useful Improvements in PantographicEngraving-Machines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use it,reference being had to the accompanying drawings, which form part ofthis specification.

My invention relates to an improvement in pantographicengraving-machines; and consists in the adjustable working-table beneaththe diminishing point of the pantograph, and the hinged and flangedtracing-table beneath the enlarging point of said pantograph, as will behereinafter more clearly and fully set forth,

Figure l of the drawing represents a side view of a pantographicengraving-machine embodying my invention, and Fig.2 represeglts a planview of my adjustable workingta e.

A represents the base of the machine, at the rear end of which issecured an arched beam or frame, B. This frameB,which serves as astandard or support to the pantograph, I

is made rigid, and this feature, in connection with my adjustable tableor platform D, constitutes one of the main improvements over the deviceshown in Letters Patent to me, granted February 2, 1875, No. 159,488.

By the provision herein shown I am enabled to bring the work up to thepoint of the pantograph without disturbing the line of direction of the-pantograph itself, whereas inmy former device, above referred to, thepantograph is made vertically adjustable. By experience with saiddevice, I have sometimes founddifficulty in operating upon irregularsurfaces, and this difficultyhas been overcome by bringmg the work up tothe pantograph-points instead of bringing the pantograph down to thework, and herein consists the essential feature of my invention.

To the said frame B is pivoted the swinging bed O,which extends forwardand rests on the base A. Y i

D is the working-table, firmly secured to the upper end of therack-carrying slide E.

F is a shaft, journaled in suitable bearings in, or attached to, the bed0, and carrying on its inner end a pinion or small spur-gear, G, whichengages with the rack on the slide E.

His a set-screw, by which the table is retained or fastened at anydesired altitude.

The base A is provided with an opening, to admit the lower part of theslide E, and accommodate its vertical movement.

By means of this device the working-table, holding the article to beengraved, can be readily and accurately elevated and loweredthat is,adjusted relatively to the pantograph, to suit the various thicknessesof the articles to be operated upon-and when adjusted the The operationof this device is as follows:

The article or plate to be traced, of the same width as the form ortracing table, is placed thereon, and then the cam N is operated toelevate the table, and thus cause the edges of the tracing article to bepressed between the the form-table and the flanged side pieces, thusfirmly retaining the same in position; or a flange may be turned on thetracing article to fit between the rear side of the form-table and theside piece K.

What I claim as my invention, and desire to secure by Letters Patent,is-- 1. In a pantographic engraving machine, the combination, with afixed pantograph-supthe flanged side pieces K K and vcam N,substantially as and for the purpose described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM S. WIGHT.

Witnesses:

JAMES NORTON, RoLLIN S. WEBB,

